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思考物理问题时如果没有考虑清楚实际情境,往往会得出错误的结论,即使在高考命题及其标准答案中,这种情况也会出现.当然,高考题多为比较优秀的题目,下面所谈只是高考题中的白璧微瑕.题1(2001,上海高考) 跳伞运动员在刚跳离飞机、降落伞尚未打开的一段时间内,下列说法中正确的是 ( )A.空气阻力做正功 B.重力势能增加C.动能增加 D.空气阻力做负功
When thinking about physics problems, if you do not consider the actual situation, you will often draw a wrong conclusion. Even in the college entrance examination proposition and its standard answer, this situation will appear. Of course, the college entrance examination questions are mostly excellent ones. Only in the college entrance examination questions in the day and night. Question 1 (2001, Shanghai college entrance examination) Parachuting athletes just jumped from the plane, parachute has not been opened for a period of time, the following statement is correct () A. air resistance to do positive work B · Gravity potential energy increase C. Kinetic energy increase D. Air resistance negative work